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You searched for: Journal Journal of polymer science Remove constraint Journal: Journal of polymer science Publication Year 2018 Remove constraint Publication Year: 2018 Source 2018 v.56 no.15 Remove constraint Source: 2018 v.56 no.15
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1. Characteristics and self‐assembly behaviors of photochromic triblock azo‐copolymers based on hard‐soft‐hard segments synthesized via RAFT process Part A Polymer chemistry

Author:
Zenati, Athmen; Thammalangsy, Soulighothai
Source:
Journal of polymer science 2018 v.56 no.15 pp. 1617-1629
ISSN:
0887-624X
Subject:
atomic force microscopy; chemical structure; differential scanning calorimetry; endothermy; gel chromatography; heat production; irradiation; molecular weight; nanomaterials; nuclear magnetic resonance spectroscopy; photochemistry; polymerization; polymethylmethacrylate; small-angle X-ray scattering; texture; thermal properties; ultraviolet-visible spectroscopy
Abstract:
... A novel series of hard‐soft‐hard triblock azo‐copolymers (TBCs) composed of poly(2‐[2‐(4‐cyano‐azobenzene‐4‐oxy)ethylene‐oxy]ethyl methacrylate) (PCEAMA), poly(methyl methacrylate) (PMMA) and poly(p‐dodecylphenyl‐N‐acrylamide) (PDOPAM) were synthesized by employing reversible addition‐fragmentation chain transfer polymerization. Chemical structures and molecular weights were characterized by ¹H nu ...
DOI:
10.1002/pola.29025

2. Controlled aggregation behavior of thermoresponsive polymeric micelles by introducing hydrophilic segments as corona components Part A Polymer chemistry

Author:
Akimoto, Jun; Ito, Yoshihiro; Okano, Teruo; Nakayama, Masamichi
Source:
Journal of polymer science 2018 v.56 no.15 pp. 1695-1704
ISSN:
0887-624X
Subject:
acrylamides; composite polymers; drugs; hydrodynamics; hydrophilicity; micelles; mixing; phase transition; temperature
Abstract:
... Poly[N‐isopropylacrylamide‐co‐N‐(3‐methoxypropyl)acrylamide]‐b‐poly(D,L‐lactide) (P(IPAAm‐co‐MPAAm)‐b‐PLA) as a thermoresponsive block copolymer and PMPAAm‐b‐PLA as a nonthermoresponsive block copolymer were co‐assembled into thermoresponsive polymeric micelles in water. In addition, PMPAAm‐b‐P(IPAAm‐co‐MPAAm)‐b‐PLA triblock copolymer was assembled to form thermoresponsive micelles with a hydrophi ...
DOI:
10.1002/pola.29050

3. Design of multivalent fluorescent dendritic probes for site‐specific labeling of biomolecules Part A Polymer chemistry

Author:
Martín‐Serrano Ortiz, Ángela; Stenström, Patrik; Mesa Antunez, Pablo; Andrén, Oliver C. J.; Torres, Maria J.; Montañez, Maria I.; Malkoch, Michael
Source:
Journal of polymer science 2018 v.56 no.15 pp. 1609-1616
ISSN:
0887-624X
Subject:
antibodies; biochemical compounds; chemoselectivity; fluorescence; fluorescent dyes; polymers
Abstract:
... Herein, the synthesis and characterization of orthogonal dendrons decorated with multiple units of fluorescent and a chemoselective group at a focal point, followed by specific antibody labeling, is presented. Fluorescence results confirm the applicability of the fluorescent probes for biomolecule labeling and fluorescent signal amplification. ...
DOI:
10.1002/pola.29055

4. Design, synthesis, and gas permeation properties of polyimides containing pendent imidazolium groups Part A Polymer chemistry

Author:
Shrimant, Bharat; Kharul, Ulhas K.; Wadgaonkar, Prakash P.
Source:
Journal of polymer science 2018 v.56 no.15 pp. 1721-1729
ISSN:
0887-624X
Subject:
anion exchange; carbon dioxide; lithium; methyl iodide; molecular weight; permeability; phthalic anhydride; polymers; solubility; temperature; thermogravimetry; weight loss
Abstract:
... Film‐forming polymers containing ionic groups have attracted considerable attention as emerging materials for gas separation applications. The aim of this article was to synthesize new film‐forming polyimides containing imidazolium groups (PI‐IMs) and establish their structure–performance relationship. In this context, a new aromatic diamine, namely, N¹‐(4‐aminophenyl)‐N¹‐(4‐(2‐phenyl‐1H‐imidazol‐ ...
DOI:
10.1002/pola.29053

5. Diketopyrrolopyrrole‐based polymer fibrils formation by changing molecular conformation during film formation Part B Polymer physics

Author:
Chen, Liang; Zhao, Kefeng; Cao, Xinxiu; Liu, Jiangang; Yu, Xinhong; Han, Yanchun
Source:
Journal of polymer science 2018 v.56 no.15 pp. 1079-1086
ISSN:
0887-6266
Subject:
additives; chloroform; microstructure; molecular conformation; polymers; solubility; solvents; transmission electron microscopy
Abstract:
... The microstructure of conjugated polymers film is strongly dependent on factors such as the conformation and the film formation processing. In this article, we show how to induce more planarization conformation of conjugated polymer backbone during film formation processing and finally leading to the fibrils formation of the cast film. The conjugated polymer we used is poly[[2,5‐bis(2‐octyldodecyl ...
DOI:
10.1002/polb.24609

6. Effect of arrangement of nano and micro barium titanate (BaTiO3) particles on the enhanced dielectric constant of high‐density polyethylene (HDPE)/BaTiO3 Part B Polymer physics

Author:
Su, Jun; Zhang, Jun
Source:
Journal of polymer science 2018 v.56 no.15 pp. 1101-1108
ISSN:
0887-6266
Subject:
barium titanate; dielectric properties; mechanical properties; polyethylene; thermal conductivity
Abstract:
... The aim of this study is to improve the dielectric and mechanical properties of HDPE/BaTiO₃ composites by binary BaTiO₃ particles, when the volume fraction of BaTiO₃ is constant. In this study, it was found that the pack density of binary BaTiO₃ particles in HDPE/BaTiO₃ composite relies on particle ratio and volume fraction of small particles. It is found that the addition of 50 vol % 1600 nm BaTi ...
DOI:
10.1002/polb.24629

7. Effect of substitution positions of alkyl side chains in phenanthrodithiophene–isoindigo copolymers: The enhancement of crystallinity and control of molecular orders Part A Polymer chemistry

Author:
Mori, Hiroki; Hara, Shuto; Toyama, Ryota; Asanuma, Yuya; Takahashi, Ryosuke; Nishinaga, Shuhei; Nishihara, Yasushi
Source:
Journal of polymer science 2018 v.56 no.15 pp. 1757-1767
ISSN:
0887-624X
Subject:
chemical interactions; composite polymers; crystal structure; electric current; molecular weight; separation; solar cells
Abstract:
... The synthesis, characterization, and solar cell application of newly developed two semiconducting polymers containing phenanthro[1,2‐b:8,7‐b′]dithiophene (PDT) and an isoindigo (IID) unit are described. In addition, a relationship between substitution position of side chains and molecular weights of the polymers and their solar cell performance are also discussed. Because of the installation of al ...
DOI:
10.1002/pola.29058

8. Fabrication of well‐defined shape memory graft polymers derived from biomass: An insight into the effect of side chain architecture on shape memory properties Part A Polymer chemistry

Author:
Lu, Chuanwei; Liu, Yupeng; Yu, Juan; Wang, Chunpeng; Wang, Jifu; Chu, Fuxiang
Source:
Journal of polymer science 2018 v.56 no.15 pp. 1711-1720
ISSN:
0887-624X
Subject:
biomass; cellulose; composite polymers; fatty acids; furfural; phase transition; transmission electron microscopy
Abstract:
... Fully sustainable shape memory polymers (SMPs) derived from ethyl cellulose (EC, derived from cellulose), tetrahydrofurfuryl methacrylate (THFMA, derived from furfural), and lauryl methacrylate (LMA, derived from fatty acids) were prepared via “grafting from” atom transfer radical polymer (ATRP). The “grafting from” ATRP strategy allows to fabricate SMPs with EC as a backbone, and LMA and THFMA co ...
DOI:
10.1002/pola.29052

9. Facile preparation of superhydrophobic and oleophobic surfaces via the combination of Cu(0)‐mediated reversible‐deactivation radical polymerization and click chemistry Part A Polymer chemistry

Author:
Enayati, Mojtaba; Abbaspourrad, Alireza
Source:
Journal of polymer science 2018 v.56 no.15 pp. 1684-1694
ISSN:
0887-624X
Subject:
atomic force microscopy; chemical bonding; contact angle; copper; glass; hydrophobicity; infrared spectroscopy; oils; polymerization; polymers; roughness; temperature; thermogravimetry; transmission electron microscopy; wettability
Abstract:
... The fabrication of novel hydrophobic, superhydrophobic, and oleophobic surfaces on glass using nanosilica particles modified with polymer brushes prepared via surface initiated Cu(0)‐mediated reversible‐deactivation radical polymerization was demonstrated. Monomers including n‐butyl acrylate, 2,2,2‐trifluoroethyl methacrylate, and 1,1,1,3,3,3‐hexafluoroisopropyl acrylate were used to synthesize a ...
DOI:
10.1002/pola.29049

10. Functionalization of poly(bis‐thiophene methine)s via facile C–C bulk polymerization and their application as chemosensors for acid detection Part A Polymer chemistry

Author:
Peng, Kai; Pei, Tong; Huang, Ni; Yuan, Liangjie; Liu, Xinghai; Xia, Jiangbin
Source:
Journal of polymer science 2018 v.56 no.15 pp. 1676-1683
ISSN:
0887-624X
Subject:
halogens; hydrochloric acid; nitric acid; polymerization; polymers; van der Waals forces
Abstract:
... Up to now, 3,4‐ethylenedioxythiophene (EDOT) or its modified analogs are indispensable units or subunits in all successful monomers for polythiophene synthesis through solid‐state polymerization (SSP). Here, a more open thiophene‐(CH(R))‐thiophene platform was developed successfully and corresponding poly(bis‐thiophene methine)s were obtained via C–C SSP or melt‐state polymerization (MSP), that is ...
DOI:
10.1002/pola.29047

11. Linear viscoelastic studies on a transient network formed by host–guest interaction Part B Polymer physics

Author:
Kashiwagi, Yu; Katashima, Takuya; Nakahata, Masaki; Takashima, Yoshinori; Harada, Akira; Inoue, Tadashi
Source:
Journal of polymer science 2018 v.56 no.15 pp. 1109-1117
ISSN:
0887-6266
Subject:
acrylamides; nuclear magnetic resonance spectroscopy; polymerization; polymers; viscoelasticity
Abstract:
... A host–guest (HG) polymer was prepared through the radical polymerization of acrylamide monomers (AAm) with a small amount of host‐guest linkers, β‐cyclodextrin‐attached AAm (βCD‐AAm) and adamantane‐attached AAm (Ad‐AAm). The linear viscoelastic and swelling measurements indicated that the resulting HG polymer swollen in water was gel‐like, although the HG polymer is conceptually a linear chain ha ...
DOI:
10.1002/polb.24630

12. Long‐chain branched random polyethylene via acyclic diene metathesis (ADMET) copolymerization Part A Polymer chemistry

Author:
Li, Hong; Rojas, Giovanni; Wagener, Kenneth B.
Source:
Journal of polymer science 2018 v.56 no.15 pp. 1705-1710
ISSN:
0887-624X
Subject:
branches; composite polymers; copolymerization; endothermy; feedstocks; melting; models; polyethylene
Abstract:
... Five types of ethylene/α‐alkene model copolymers containing 21‐carbon alkyl branches have been synthesized via acyclic diene metathesis (ADMET) copolymerization. The overall branch content is controlled by varying the feedstock ratio of the long‐chain branched symmetrical α, ω‐diene and 1,9‐decadiene. Well‐defined melting transitions are present at low branch incorporation, followed by the broaden ...
DOI:
10.1002/pola.29051

13. Nonvolatile write‐once read‐many‐times memory behaviors of polyimides containing tetraphenyl fluorene core and the pendant triphenylamine or carbazole moieties Part A Polymer chemistry

Author:
Yang, Yanhua; Ding, Zijun; Xia, Jingcheng; Zheng, Youxuan; Ding, Shijin; Shen, Yingzhong
Source:
Journal of polymer science 2018 v.56 no.15 pp. 1630-1644
ISSN:
0887-624X
Subject:
X-ray diffraction; aluminum; atomic force microscopy; computer hardware; diamines; electric power; electrodes; energy; fluorenes; indium tin oxide; models; moieties; molecular dynamics; polymers; solubility; thermal stability
Abstract:
... To better understand the structure–property relationships, two novel aromatic diamines containing tetraphenyl fluorene (TPF) moiety through triphenylamine (TPA) unit and carbazole (Cz) unit modification are designed and synthesized, respectively. Four thermally stable and excellent solubility polyimides are prepared and characterized. The excellent film‐formation ability and thin film stability ar ...
DOI:
10.1002/pola.29039

14. Radical polymerizations of two stereoisomeric trimethacrylates with rigid adamantane‐like cores from naturally occurring myo‐inositol Part A Polymer chemistry

Author:
Okamoto, Shusuke; Tanaka, Kentaro; Sudo, Atsushi
Source:
Journal of polymer science 2018 v.56 no.15 pp. 1743-1748
ISSN:
0887-624X
Subject:
crosslinking; moieties; myo-inositol; polymerization; polymers; thermal stability
Abstract:
... Two stereoisomeric trimethacrylates, T1 and T2, which share a common adamantane‐like rigid core, were synthesized from naturally occurring myo‐inositol, and their radical polymerization behaviors were investigated. For the synthesis of T1, myo‐inositol was converted to triol 1, bearing one equatorial hydroxyl group and two axial hydroxyl groups, by orthoesterification, which was used as a precurso ...
DOI:
10.1002/pola.29056

15. Synthesis and radical polymerization properties of thermal radical initiators based on o‐imino‐isourea: The effect of the alkyl side chain on the radical initiation temperature Part A Polymer chemistry

Author:
Lee, Kyu Cheol; Jeong, Su Bin; Kim, Dong Yeon; Lee, Tae Hee; Kim, Soon Cheon; Kim, Jin Chul; Lee, Sang‐Ho; Noh, Seung Man; Park, Young Il
Source:
Journal of polymer science 2018 v.56 no.15 pp. 1749-1756
ISSN:
0887-624X
Subject:
density functional theory; differential scanning calorimetry; dissociation; free radicals; half life; homolytic cleavage; modulus of elasticity; moieties; nuclear magnetic resonance spectroscopy; polymerization; polymers; rheometers; temperature; thermal properties; thermogravimetry
Abstract:
... Four types of thermal radical initiators (TRIs) that are based on o‐imino‐isourea with cyclohexyl and isopropyl groups were successfully synthesized, namely, C‐HexDCC, DiiprDCC, C‐HexDIC, and DiiprDIC. The free radical polymerization and thermal properties of those synthesized TRIs were determined via differential scanning calorimetry (DSC) (using n‐butyl acrylate) and thermogravimetric analysis ( ...
DOI:
10.1002/pola.29057

16. Synthesis, characterization, and evaluation of polyisobutylene‐based imido‐amine‐type dispersants containing exclusively non‐nucleophilic nitrogen Part A Polymer chemistry

Author:
Holbrook, Travis P.; Masson, Georgeta M.; Storey, Robson F.
Source:
Journal of polymer science 2018 v.56 no.15 pp. 1657-1675
ISSN:
0887-624X
Subject:
adsorption; byproducts; combustion; corrosion; diesel engines; dispersants; gasoline; lubricants; matrix-assisted laser desorption-ionization mass spectrometry; metals; neutralization; nitrogen; nuclear magnetic resonance spectroscopy; phthalic anhydride; piperazine; polymers; seals; secondary amines; soot; tertiary amines
Abstract:
... Lubricating oils for gasoline and diesel engines are formulated to include amphiphilic dispersants for soot particle stabilization and prevention of particle aggregation. Primary and secondary amines used within the polar group of traditional dispersants provide basic nitrogen, which is able to neutralize acidic by‐products from combustion and does not contribute to sulfated ash. However, these ac ...
DOI:
10.1002/pola.29046

17. Synthesis of aniline‐terminated polyethers and resulting polyurethane/polyurea elastomers Part A Polymer chemistry

Author:
Sonnenschein, Mark F.; Virgili, Justin M.; Larive, Matthew Z.; Wendt, Benjamin L.
Source:
Journal of polymer science 2018 v.56 no.15 pp. 1730-1742
ISSN:
0887-624X
Subject:
analytical methods; aniline; biological resistance; epoxides; molecular weight; polyamides; polyols; polyurethanes; secondary amines; temperature; tensile strength
Abstract:
... Functionalization of polyols with aromatic amines offers a potential route to modify properties of polyurethanes, polyamides, and epoxies. Additionally, aniline termination of polyether backbones provides the opportunity to speed up reactions with isocyanates relative to hydroxyl functionalization and slow down epoxy reactions compared to reactions with primary and secondary amines. In this articl ...
DOI:
10.1002/pola.29054

18. Tailored bimodal ultra‐high molecular weight polyethylene particles Part A Polymer chemistry

Author:
Lafleur, Sarah; Berthoud, Romain; Ensinck, Richard; Cordier, Astrid; De Cremer, Gert; Philippaerts, An; Bastiaansen, Kees; Margossian, Tigran; Severn, John R.
Source:
Journal of polymer science 2018 v.56 no.15 pp. 1645-1656
ISSN:
0887-624X
Subject:
catalysts; magnesium chloride; molecular weight; particle size; polyethylene; polymerization
Abstract:
... A single molecular catalyst system supported on MgCl₂ has been developed and combined with a simple two‐stage fed‐batch polymerization process to produce tailored bimodal polyethylene reactor blend particles of UHMWPE. By varying and controlling the process conditions in the first stage and second stage, bimodal HMWPE:UHMWPE reactor particles are obtained with independent control over the individu ...
DOI:
10.1002/pola.29037

19. Time‐dependent deformation of structurally chiral polymer networks in stabilized cholesteric liquid crystals Part B Polymer physics

Author:
Lee, Kyung Min; Tondiglia, Vincent P.; Rumi, Mariacristina; White, Timothy J.
Source:
Journal of polymer science 2018 v.56 no.15 pp. 1087-1093
ISSN:
0887-6266
Subject:
crosslinking; deformation; electric field; liquid crystals; optical isomerism; polymerization; polymers; wavelengths
Abstract:
... Polymerization of crosslinkable liquid crystal monomers in chiral liquid crystalline media stabilizes the phase and enables distinct electro‐optic properties relative to small‐molecule analogs. Particularly interesting are cases where the polymerization forms a crosslinked polymer network that maintains a “structural” chirality. Recent reports have employed this methodology to realize a diverse se ...
DOI:
10.1002/polb.24621

20. Unveiling of polymer/fullerene blend films morphology by ellipsometrically determined optical order within polymer and fullerene phases Part B Polymer physics

Author:
Bednarski, Henryk; Hajduk, Barbara; Domański, Marian; Jarząbek, Bożena; Nitschke, Paweł; Łaba, Katarzyna; Wanic, Andrzej; Łapkowski, Mieczysław
Source:
Journal of polymer science 2018 v.56 no.15 pp. 1094-1100
ISSN:
0887-6266
Subject:
annealing; fullerene; models; optical properties; polymers; spectroscopy
Abstract:
... Optical properties of polymer/fullerene blend films upon thermal annealing are investigated by spectroscopic ellipsometry and described consistently within an optical model of the blend film. The optical model developed in this work treats both components, polymer and fullerene, as mixtures of reference materials, that is, their optically ordered and disordered phase. Then, the polymer/fullerene b ...
DOI:
10.1002/polb.24627